I've found a combination that doesn't work:A column family that have a secondary index and caching='ALL' withdata in two datacenters and I do a restart of the nodes, then mysecondary index queries start returning 0 rows.It happens when amount of data goes over a certain threshold, so Isuspect that compactions are involved in this as well.Taking out one of the ingredients fixes the problem and my queriesreturn rows from secondary index.I suspect that this guy is struggling with the same thinghttps://issues.apache.org/jira/browse/CASSANDRA-4785